Here are logs with session tracing set to 0x08FFF and server tracing set to 0x0FFFF. Leonardo I will try your solution tomorrow, I have no use for apparmor anyway.

From the faxlog:
Sep 02 12:22:29.69: [ 4541]: SESSION BEGIN <number hidden>
Sep 02 12:22:29.69: [ 4541]: HylaFAX (tm) Version 6.0.3
Sep 02 12:22:29.69: [ 4541]: <-- [4:ATA\r]
Sep 02 12:22:34.94: [ 4541]: --> [7:CONNECT]
Sep 02 12:22:34.94: [ 4541]: ANSWER: FAX CONNECTION  DEVICE '/dev/ttyS0'
Sep 02 12:22:34.94: [ 4541]: STATE CHANGE: ANSWERING -> RECEIVING
Sep 02 12:22:34.94: [ 4541]: RECV FAX: begin
Sep 02 12:22:34.95: [ 4541]: <-- HDLC<32:FF C0 04 B5 00 AA 12 9E 36 86 62 82 1A 04 14 2E B6 94 04 6A A6 4E CE 96 F6 76 04 6C 74 0C 74 CC>
Sep 02 12:22:34.95: [ 4541]: <-- data [32]
Sep 02 12:22:34.95: [ 4541]: <-- data [2]
Sep 02 12:22:35.94: [ 4541]: --> [7:CONNECT]
Sep 02 12:22:35.94: [ 4541]: <-- HDLC<23:FF C0 02 CE 4E A6 76 2E 4E 86 0A 64 2E 66 F6 4E C6 A6 A6 42 04 04 04>
Sep 02 12:22:35.94: [ 4541]: <-- data [23]
Sep 02 12:22:35.94: [ 4541]: <-- data [2]
Sep 02 12:22:35.96: [ 4541]: --> [7:CONNECT]
Sep 02 12:22:35.96: [ 4541]: <-- HDLC<13:FF C8 01 00 77 5F 23 01 FB C1 01 01 18>
Sep 02 12:22:35.96: [ 4541]: <-- data [13]
Sep 02 12:22:35.96: [ 4541]: <-- data [2]
Sep 02 12:22:38.08: [ 4541]: --> [2:OK]
Sep 02 12:22:38.08: [ 4541]: <-- [9:AT+FRH=3\r]
Sep 02 12:22:38.57: [ 4541]: --> [7:CONNECT]
Sep 02 12:22:39.74: [ 4541]: --> HDLC<9:FF C8 C1 00 46 1F 00 3D 9B>
Sep 02 12:22:39.75: [ 4541]: --> [2:OK]
Sep 02 12:22:39.75: [ 4541]: RECV recv DCS (command signal)
Sep 02 12:22:39.75: [ 4541]: REMOTE wants 14400 bit/s
Sep 02 12:22:39.75: [ 4541]: REMOTE wants A4 page width (215 mm)
Sep 02 12:22:39.75: [ 4541]: REMOTE wants unlimited page length
Sep 02 12:22:39.75: [ 4541]: REMOTE wants 7.7 line/mm
Sep 02 12:22:39.75: [ 4541]: REMOTE wants 1-D MH
Sep 02 12:22:39.75: [ 4541]: RECV training at v.17 14400 bit/s
Sep 02 12:22:39.75: [ 4541]: <-- [11:AT+FRM=145\r]
Sep 02 12:22:41.24: [ 4541]: --> [7:CONNECT]
Sep 02 12:22:43.06: [ 4541]: RECV: TCF 2934 bytes, 6% non-zero, 2732 zero-run
Sep 02 12:22:43.27: [ 4541]: --> [10:NO CARRIER]
Sep 02 12:22:43.27: [ 4541]: <-- [9:AT+FRS=7\r]
Sep 02 12:22:43.28: [ 4541]: --> [2:OK]
Sep 02 12:22:43.28: [ 4541]: TRAINING succeeded
Sep 02 12:22:43.28: [ 4541]: <-- [9:AT+FTH=3\r]
Sep 02 12:22:43.33: [ 4541]: --> [7:CONNECT]
Sep 02 12:22:43.33: [ 4541]: <-- HDLC<3:FF C8 21>
Sep 02 12:22:43.33: [ 4541]: <-- data [3]
Sep 02 12:22:43.33: [ 4541]: <-- data [2]
Sep 02 12:22:44.56: [ 4541]: --> [2:OK]
Sep 02 12:22:44.56: [ 4541]: <-- [11:AT+FRM=146\r]
Sep 02 12:22:46.96: [ 4541]: --> [7:CONNECT]
Sep 02 12:22:46.96: [ 4541]: MODEM input buffering enabled
Sep 02 12:22:46.96: [ 4541]: RECV: begin page
Sep 02 12:22:47.09: [ 4541]: RECV/CQ: Bad 1D pixel count, row 0, got 1843, expected 1728
Sep 02 12:22:47.38: [ 4541]: RECV/CQ: Bad 1D pixel count, row 1, got 1830, expected 1728
Sep 02 12:22:47.52: [ 4541]: RECV/CQ: Bad 1D pixel count, row 2, got 1745, expected 1728
Sep 02 12:22:47.52: [ 4541]: RECV/CQ: Bad 1D pixel count, row 3, got 3722, expected 1728
Sep 02 12:22:47.66: [ 4541]: RECV/CQ: Bad 1D pixel count, row 4, got 3187, expected 1728
Sep 02 12:22:48.01: [ 4541]: RECV/CQ: Bad 1D pixel count, row 5, got 2230, expected 1728
Sep 02 12:22:48.65: [ 4541]: RECV/CQ: Bad 1D pixel count, row 6, got 32, expected 1728
Sep 02 12:22:49.84: [ 4541]: RECV/CQ: Bad 1D pixel count, row 7, got 2807, expected 1728

Please note that the bad 1D pixel counts occur elsewhere and do not cause crashes so it may not be that.

From the syslog:
Sep  2 12:21:31 Shula FaxGetty[4541]: STATE CHANGE: RUNNING -> LISTENING
Sep  2 12:21:31 Shula FaxGetty[4541]: --> [4:RING]
Sep  2 12:21:37 Shula FaxGetty[4541]: last message repeated 2 times
Sep  2 12:21:37 Shula FaxGetty[4541]: STATE CHANGE: LISTENING -> ANSWERING
Sep  2 12:21:42 Shula FaxGetty[4541]: ANSWER: FAX CONNECTION  DEVICE '/dev/ttyS0'
Sep  2 12:22:12 Shula FaxGetty[4541]: RECV FAX (000022372): from <UNSPECIFIED>, page 1 in 0:00:26, INF, 7.7 line/mm, 1-D MH, 14400 bit/s
Sep  2 12:22:12 Shula FaxGetty[4541]: RECV FAX (000022372): recvq/fax000022382.tif from <UNSPECIFIED>, route to <unspecified>, 1 pages in 0:00:30
Sep  2 12:22:12 Shula FaxGetty[4541]: RECV FAX: bin/faxrcvd "recvq/fax000022382.tif" "ttyS0" "000022372" ""
Sep  2 12:22:12 Shula FaxGetty[4541]: <-- [5:ATH0\r]
Sep  2 12:22:12 Shula FaxGetty[4541]: --> [2:OK]
Sep  2 12:22:12 Shula FaxGetty[4541]: MODEM set DTR OFF
Sep  2 12:22:13 Shula FaxGetty[4541]: MODEM set DTR OFF
Sep  2 12:22:13 Shula FaxGetty[4541]: DELAY 75 ms
Sep  2 12:22:14 Shula FaxGetty[4541]: MODEM set DTR ON
Sep  2 12:22:14 Shula FaxGetty[4541]: DELAY 2600 ms
Sep  2 12:22:17 Shula FaxGetty[4541]: MODEM set baud rate: 19200 baud, input flow RTS/CTS, output flow RTS/CTS
Sep  2 12:22:17 Shula FaxGetty[4541]: DELAY 10 ms
Sep  2 12:22:17 Shula FaxGetty[4541]: MODEM flush i/o
Sep  2 12:22:17 Shula FaxGetty[4541]: <-- [4:ATZ\r]
Sep  2 12:22:19 Shula FaxGetty[4541]: --> [2:OK]
Sep  2 12:22:19 Shula FaxGetty[4541]: DELAY 3000 ms
Sep  2 12:22:22 Shula FaxGetty[4541]: MODEM flush i/o
Sep  2 12:22:22 Shula FaxGetty[4541]: <-- [7:ATS0=0\r]
Sep  2 12:22:22 Shula FaxGetty[4541]: --> [6:ATS0=0]
Sep  2 12:22:22 Shula FaxGetty[4541]: --> [2:OK]
Sep  2 12:22:22 Shula FaxGetty[4541]: <-- [5:ATE0\r]
Sep  2 12:22:22 Shula FaxGetty[4541]: --> [4:ATE0]
Sep  2 12:22:22 Shula FaxGetty[4541]: --> [2:OK]
Sep  2 12:22:22 Shula FaxGetty[4541]: <-- [5:ATV1\r]
Sep  2 12:22:22 Shula FaxGetty[4541]: --> [2:OK]
Sep  2 12:22:22 Shula FaxGetty[4541]: <-- [5:ATQ0\r]
Sep  2 12:22:22 Shula FaxGetty[4541]: --> [2:OK]
Sep  2 12:22:22 Shula FaxGetty[4541]: <-- [7:ATS8=2\r]
Sep  2 12:22:23 Shula FaxGetty[4541]: --> [2:OK]
Sep  2 12:22:23 Shula FaxGetty[4541]: <-- [8:ATS7=60\r]
Sep  2 12:22:23 Shula FaxGetty[4541]: --> [2:OK]
Sep  2 12:22:23 Shula FaxGetty[4541]: <-- [6:AT&K3\r]
Sep  2 12:22:23 Shula FaxGetty[4541]: --> [2:OK]
Sep  2 12:22:23 Shula FaxGetty[4541]: <-- [6:AT&D2\r]
Sep  2 12:22:23 Shula FaxGetty[4541]: --> [2:OK]
Sep  2 12:22:23 Shula FaxGetty[4541]: <-- [6:AT&C1\r]
Sep  2 12:22:23 Shula FaxGetty[4541]: --> [2:OK]
Sep  2 12:22:23 Shula FaxGetty[4541]: <-- [12:AT+FCLASS=?\r]
Sep  2 12:22:23 Shula FaxGetty[4541]: --> [5:0,1,2]
Sep  2 12:22:23 Shula FaxGetty[4541]: --> [2:OK]
Sep  2 12:22:23 Shula FaxGetty[4541]: MODEM Supports "Data"
Sep  2 12:22:23 Shula FaxGetty[4541]: MODEM Supports "Class 1"
Sep  2 12:22:23 Shula FaxGetty[4541]: MODEM Supports "Class 2"
Sep  2 12:22:23 Shula FaxGetty[4541]: <-- [12:AT+FCLASS=1\r]
Sep  2 12:22:23 Shula FaxGetty[4541]: --> [2:OK]
Sep  2 12:22:23 Shula FaxGetty[4541]: MODEM: Mfr Rockwell
Sep  2 12:22:23 Shula FaxGetty[4541]: <-- [5:ATI3\r]
Sep  2 12:22:24 Shula FaxGetty[4541]: --> [22:04-00903-6.00 210 PASS]
Sep  2 12:22:24 Shula FaxGetty[4541]: --> [22:40-00540-BC 16683 PASS]
Sep  2 12:22:24 Shula FaxGetty[4541]: --> [2:OK]
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM: Model RC288DPi
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM: Revision 04-00903-6.00 210 PASS#01240-00540-BC 16683 PASS
Sep  2 12:22:24 Shula FaxGetty[4541]: <-- [9:AT+FTM=?\r]
Sep  2 12:22:24 Shula FaxGetty[4541]: --> [39:24,48,72,73,74,96,97,98,121,122,145,146]
Sep  2 12:22:24 Shula FaxGetty[4541]: --> [2:OK]
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 3.85 line/mm
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 7.7 line/mm
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 15.4 line/mm
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports R16 x 15.4 line/mm
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 200 x 100 dpi
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 200 x 200 dpi
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 200 x 400 dpi
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 300 x 300 dpi
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 2400 bit/s
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 4800 bit/s
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 7200 bit/s
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 9600 bit/s
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 12000 bit/s
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 14400 bit/s
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports A4 page width (215 mm)
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports B4 page width (255 mm)
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports A3 page width (303 mm)
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports A4 page length (297 mm)
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports B4 page length (364 mm)
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports unlimited page length
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 1-D MH
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 2-D MR
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 2-D MMR
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports no ECM
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports T.30 Annex A, 64-byte ECM
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports T.30 Annex A, 256-byte ECM
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 0 ms/scanline
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 5 ms/scanline
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 10 ms, 5 ms/scanline
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 10 ms/scanline
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 20 ms, 10 ms/scanline
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 20 ms/scanline
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 40 ms, 20 ms/scanline
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM Supports 40 ms/scanline
Sep  2 12:22:24 Shula FaxGetty[4541]: <-- [9:AT+FRM=?\r]
Sep  2 12:22:24 Shula FaxGetty[4541]: --> [39:24,48,72,73,74,96,97,98,121,122,145,146]
Sep  2 12:22:24 Shula FaxGetty[4541]: --> [2:OK]
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM ROCKWELL RC288DPi/04-00903-6.00 210 PASS#01240-00540-BC 16683 PASS
Sep  2 12:22:24 Shula FaxGetty[4541]: <-- [5:ATM0\r]
Sep  2 12:22:24 Shula FaxGetty[4541]: --> [2:OK]
Sep  2 12:22:24 Shula FaxGetty[4541]: STATE CHANGE: RECEIVING -> RUNNING (timeout 30)
Sep  2 12:22:24 Shula FaxGetty[4541]: MODEM input buffering disabled
Sep  2 12:22:25 Shula FaxGetty[4541]: STATE CHANGE: RUNNING -> LISTENING
Sep  2 12:22:25 Shula FaxGetty[4541]: --> [4:RING]
Sep  2 12:22:29 Shula FaxGetty[4541]: last message repeated 2 times
Sep  2 12:22:29 Shula FaxGetty[4541]: STATE CHANGE: LISTENING -> ANSWERING
Sep  2 12:22:34 Shula FaxGetty[4541]: ANSWER: FAX CONNECTION  DEVICE '/dev/ttyS0'
Sep  2 12:22:50 Shula kernel: [402280.204394] faxgetty[4541]: segfault at a8c3dc8 ip 001ec80f sp bf82b7b0 error 4 in libtiff.so.4.3.2[1b6000+58000]

Interesting to see that libtiff is involved this time.